Furnace-damper



(No Model.) I

W. H. H. BARTON.

FURNAOEDA-MPER. No. 864,888. Patented June 14, 1887'.

N. PETERS. Plwlwuumgnphar. wunin m. 01c.

in the side walls of the flue A.

nace, or other compartment.

rod,which in turn is adjustably connected with to the other and forming,as shown, a bell- UNITED STATES PATENT OFFICE.

\VlLLIAlM H. H. BARTON, OF BROOKTON, ASSIGNOR TO EDGAR W. UPTON ANDHENRY G. RICE, OF PEABODY, AND HERBERT TORREY, OF HANCOCK,

M ASSACHUSETTS.

DAMPER.

SPECIFICATION forming part of Letters Patent No. 364,888, dated n 14,1887.

Application filed July 31, 1886. Serial No. 309,641. (No model.) I

To all whom, it may concern:

Be it known that I, WILLIAM H. H. BARTON, of Brockton, county ofPlymouth, and State of Massachusetts, have invented an Improvement inFurnace-Dampers, of which the following description, in connection withthe accompanying drawings, is a specification, like letters on thedrawings representing like parts.

This invention has for its object to construct a thermostaticallyoperated damper, which may be employed to automatically regulate thedraft or ventilation of a hot-air chamber, fur- In accordance with thisinvention a pivoted lever is moved by a thermostatic coil, said pivotedlever being loosely connected with a an arm attached to and moving. thedamper, so that by any movement of the thermostatic coil the damper willbe positively moved.

Figure 1 shows a damper, thermostatic coil, and connecting deviceembodying this invention, the damper being shown in connection with asection of a hot-air oven or compartment, and taken on, the dotted line00 m, Fig. 2, the coil being supposed tobe sufficiently heated to partlyopen the damper, and Fig. 2 a vertical section taken on the dotted liney y of Fig.1.

The boX or compartment'A, representing in this instance a hot-air oven,is provided with a flue, A. A damper, c, of any suitable shape, isattached to the shaft a, having its bearings Two arms, a (5, are securedto the end of the shaft a, to extend therefrom at an angle one withrelation crank. To one end of the arm, as a is adjustably attached, byan adjusting-screw, b, a rod or connecting-lever, b, the opposite end ofthe said rod or connecting-lever being looped, as at If, to receiveloosely one end of an operating-lever, c, pivoted upon a post, 0,mounted upon a plate, 0, the opposite end of the said operating-leverbeing attached to the free end of a thermostatic coil, 0, of any usualconstru ction. The plate 0 resting upon a plate, 0, secured to some partof the frame-work A, is

slotted lengthwise, as at c, and provided with an adj listing-screw, 0to thereby permit the said plate to be adjusted as desired. The arm a,attached to the damper-shaft a, is provided with a lug or projection, c,of sufficient length to strike the rod 0 when the damper is turned intovertical position by the said rod, the said. arm limiting the movementof the damper'to prevent it closing in the opposite direction when thethermostatic coil is exposed to excessive heat. It will thus be seenthat the movement of the thermostatic coil turns the lever 0 upon thepivot in one direction to raise the rod 1) and open the damper, and inthe opposite direction to thereby permit the rod b to fall by gravityand close the damper.

It is obvious that the construction of the limiting-stop" may bevariously modified and yet perform the results herein specified.

The connecting rodor lever b will in practice be numbered or marked withfigures to indicate to the attendantthe point upon such rod which, ifbrought to a certain definite po-' sitionas, for instance, under or justbelow the screw bwill insure the closing of the damper when thethermostat is subjected to a degree of heat indicated by the saidnumber.

The thermostat and damper herein shown may be employed in any usualclass of appa ratus wherein a damper is to be opened or closed at acertain temperatureas, for instance, the damper shown may be arranged inconnection with a hot-air furnace-so that when the heat is sufficientthe damper will be operated by the thermostat to enable cold air to beadmitted through the opening normally covered by the said damper, thecoldair checking the draft of the furnace, as is well understood.

I claim- 1. The combination, substantially as described, of the pivoteddamper, the arm a, the

connecting-rod b, one end of which is adjustably fastened to the arm aas by a set-screw,

I), the pivoted lever loosely connected with the connecting-rod, and athermostatic coil for moving said lever. 5 2. The combination,substantially as described, of the pivoted damper, the arm a,

connectiugrod b, one end of which is fastened e seem 5e to the arm a bya set screw, I), and the other end is provided with a loop, 11 thepivoted lever, one end of which enters the loop I)", and

a thermostatic coil connected with and moving 5 the said pivoted lever.

3. The combination, substantially as described, of the pivoted damper,the arm a", connecting-rod I), one end of which is fastened to the arm aby a set-screw, b, and the other IO end is provided with a loop, I), thepivoted lever, one end of which enters the loop If and is provided witha series of pins for eiljnstebly connecting the rod with the pivotedlever, and a thermostatic coil connected with and moving 15 the saidpivoted lever.

4. The combination of the pivoted damper, the arms afa", andlimiting-stop carried thereon, a connecting-rod attached to arm a, alever pivoted to said rod, and a thermostatic coil connected with saidlever, 20

In testimony whereof I have signed my name to this specification in thepresence of two subscribing, witnesses.

WILLIAM H. II. BARTON Witnesses:

G. 'W'. GREGORY, F, CUTTER.

